Fludger
Chris Fludger, Nuremberg DE
Patent application number | Description | Published |
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20130027763 | Electrical Modulator Driver Circuit for Generating Multi-Level Drive Signals for QAM Optical Transmission - An apparatus and methods for generating multi-level output signals for use by an optical modulator are provided. The apparatus comprises a plurality of input signal lines each configured to receive a binary input signal, an output signal line and a plurality of amplifier stages. The amplifier stages are each connected between one of the input signal lines and the output signal line so as to each produce an output voltage on the output signal line of either a first level or a second level. The level of the output voltage is based on the binary signal at the respective input signal line, and the output voltages of the respective plurality of amplifier stages collectively produce a summed analog output voltage on the output signal line at two or more different levels each configured to drive an optical modulator. | 01-31-2013 |
Chris Fludger, Nuernberg DE
Patent application number | Description | Published |
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20140376905 | FIBER LENGTH MEASUREMENT SYSTEM - A system for measuring a length of one or more spans between a first optical transceiver and a second optical transceiver in a fiber-optic network, which can determine, at a processor associated with the first optical transceiver, a round-trip time of an optical signal communicated from the first optical transceiver to the second optical transceiver and back to the first optical transceiver. The system can also determine, at the processor, a half-round-trip time by dividing the round-trip time by two. The system can also determine, at the processor, a distance between the first and the second optical transceivers by multiplying the speed of light by the half-round-trip time. | 12-25-2014 |
Christopher Fludger, Nuremberg DE
Patent application number | Description | Published |
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20110006825 | Phase Control Circuit and Method for Optical Receivers - This invention relates to a phase control circuit for an optical receiver (1). The phase control circuit ( | 01-13-2011 |
Christopher Fludger, Nuremberg GB
Patent application number | Description | Published |
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20120121274 | Clock Recovery for Optical Transmission Systems - A receiver for an optical communications system which corrects distortion of a received signal. A clock recovery system utilising a feedback and feedforward system are provided. The feedback loop comprises a phase detector and a clock source, while the feedforward loop comprises the phase detector and a delay element for delaying the output of distortion correction system. The feedback loop has a significantly lower bandwidth than the feedforward path. There are also provided methods of optimising tap weights and of acquiring initial tap weights. | 05-17-2012 |